I have received the IM03 (bought it for my brother) and tried for 2 weeks. So far, I love IM03 that I'm thinking of buying another pair for myself. What I love about IM03 is the fit and isolation. Comfort and isolation are #1 criteria for me and IM03 just nails it!
Although it looks huge, it is very, very comfortable once fitted with sony hybrid tips. I gotta say I prefer the IM03 fit to the IM70, even my beloved W4 and EPH-100. These are as equally comfortable as the XBA-1, surprisingly. If I score the fit and comfort, I'd grade 'em an 97/100. Putting Sony hybrid tips is a must because the stock tips are garbage for me...and yet its stem is supremely thick. I put the Sony hybrid not all the way down as shown in the picture below. This also increases distance of the nozzle as Im03 nozzle length is very short. As the result, I could insert it deeply and get better isolation. Oh, I love LOVE the isolation as well. I been commuting while wearing IM03 and heard no car's sound but just music, even at low volume. This is just like the XBA-1 insane isolation I've been expecting of.
Now I started stacking sony hybrids and putting 'em onto IM70 and JVC FXT90. It worked wonderfully on them.
Soundwise, I'll talk later about it :) but I find the treble is little bit peaky for my taste, like on "isss" during vocal singing and cymbal and hi-hat notes. Not as crazy as that horrifying XBA-30 though. Also, the soundstage is very wide! and its extension reaches to the heaven and hell. But thanks to the small bore in respect to the nozzle, putting sony hybrid won't affect the sound at all; actually, I get better fit and can listen its sound to the fullest.
Edited by Gandasaputra - 4/27/14 at 7:57pm